Chalcogen, Non-disordered, Quaternary, Transitional, Kim, Phonons

• Ba-Cu-O-Y
• La-Na-O-Ti
• Na-Nd-O-Ti
• Na-O-Sm-Ti
• Ba-Cu-Er-O
• wavenumber of optical phonon
• Raman spectra
• infrared spectra
• wavenumber of transverse optical phonon
• energy of optical phonon
• transitional
• quaternary
• non-disordered
• chalcogen
• oxide
• tetragonal
• orthorhombic
• monoclinic
• hexagonal
• trigonal